Kubernetes
Kubernetes DNS Name Validator
Enter a service name and namespace to generate the fully-qualified DNS name, short name resolution paths, and cross-namespace calling format.
Calculations run locally in your browserTool
About this tool
Kubernetes DNS Name Validator
The Kubernetes DNS Name Validator generates FQDN, short name resolution paths, and cross-namespace calling formats for Kubernetes services, with headless and ExternalName service coverage.
• Get the correct FQDN for a service before configuring an external DNS record
• Check whether a short service name resolves from a different namespace
• Validate Kubernetes name length limits before creating a service with a long name
• Understand headless service DNS behavior for a StatefulSet
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FAQ
What does this tool tell you?
The Kubernetes DNS Name Validator generates FQDN, short name resolution paths, and cross-namespace calling formats for Kubernetes services, with headless and ExternalName service coverage.
What affects the result most?
Service DNS format: {service}.{namespace}.svc.cluster.local — valid across all namespaces. Short name resolution: within same namespace, {service} resolves via ndots:5 search path. Pod DNS: {pod-ip-dashes}.{namespace}.pod.cluster.local — not typically used directly.
How should I use the result?
Treat the tool's output as a first-pass check, not a proof of correctness. A clean pass means no issues in the patterns this tool recognizes; a failure points to a specific problem you can investigate in your source. The underlying spec is the authoritative source for edge cases.
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